H1B extension RFE - new LCA

[BTP]

In my case, I am in H1B extension RFE and now I am in different client. Example - When my extension filled I was with 'A' client (it was filled for 2 yrs) and by the time i receive RFE I am with cleint 'B'. Now RFE is to submit my salary slips and client letter.

I would like to know your advise and suggestion and would like to know what is the possibiity of getting extension with new client LCA.